ESLint v10.9.0 released

Highlights

New option checkConditionalExpressions in no-unmodified-loop-condition

The no-unmodified-loop-condition rule now supports a checkConditionalExpressions option. When enabled, each branch in a ternary expression is checked independently.

For example, with { "checkConditionalExpressions": true }, the rule reports the done variable as not modified in the loop:

let chunk = getInitialChunk();
let done = false;

while (chunk ? !done : false) {
    chunk = nextOrNull();
}
1
2
3
4
5
6

Features

• 08de88e feat: handle underflow in no-loss-of-precision (#21218) (Rithish S)
• 55db479 feat: add checkConditionalExpressions to no-unmodified-loop-condition (#21175) (sethamus)

Bug Fixes

• 2ba3025 fix: prevent unsafe no-var autofix with hoisted functions (#21213) (sethamus)
• 8e69622 fix: Prevent no-var autofix when var is shadowed by catch parameter (#21204) (Yang Hyeonjong)
• 684b579 fix: prefer-template invalid autofix creates a tagged template call (#21207) (김채영)

Documentation

• 9ef407a docs: use eslint.config.* wherever config file names are listed (#21216) (Marry (Subin Yang))
• 87f66f4 docs: Update README (GitHub Actions Bot)
• 585ef37 docs: update architecture documentation (#21112) (Francesco Trotta)
• f3993b0 docs: Update README (GitHub Actions Bot)
• ffc87d6 docs: fix broken links in Further Reading sections (#21203) (Minsu)
• 1a761e1 docs: update moved JSX specification links (#21198) (Imran Mustafa)
• 4d00ca4 docs: update ESLint peer dependency to ^10.0.0 in shareable configs (#21202) (lumir)
• 510d1a2 docs: Update README (GitHub Actions Bot)

Chores

• 899dbf1 chore: update github/codeql-action action to v4.37.7 (#21243) (renovate[bot])
• 9aa3873 chore: update ecosystem plugins (#21235) (ESLint Bot)
• dc1e7a8 chore: update ecosystem plugins (#21208) (ESLint Bot)
• f878d21 ci: bump pnpm/action-setup from 6.0.9 to 6.0.10 (#21200) (dependabot[bot])
• 4891e50 ci: bump github/codeql-action from 4.37.4 to 4.37.6 (#21199) (dependabot[bot])